I'd love to read the blog posts describing how they disassembled and reassembled the game, those details are more interesting to me than playing the game :)
It's not about Syndicate Wars, but this guy spent years reversing the Outrun arcade ROM and blogging about it. It's a fascinating read: http://reassembler.blogspot.com/
... and I spent more than an hour reading his blog from the last few years. Man, what an interesting set of projects. I'm seriously jealous of his ability to restore and emulate hardware!
Yes, where's the tools? Are they not public? A good set of RE tools would enable the porting and fixing of a huge number of DOS and DOS/4GW games. This has been done for XCOM (resulting in OpenXCOM) but there are plenty of other worthy modernisation targets.